[
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2009, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]
81.207.133.35
In Reply to: RE: True but ... posted by Tony Lauck on January 15, 2009 at 08:28:40
If people only are challenged Tony.
For me it was kind of a matter of sustaining the bit perfect debate as how it (really) emerged in that large AVS thread "Audio procssing in Vista explained" and the (for me) non-sense about 48 bit internal volume processing which does exactly nothing. It made me run WASAPI in exclusive mode in December 2006 showing bit perfect being possible in Vista indeed and it would be stupid to have a digital volume which destroys exactly the same as not bit perfect supposedly does. Supposedly or audible, never mind. It is never good to start off wrongly.
Btw, when you apply some fuzzy logic, the "technique" or method can go further;
Even when you're using a 16 bit DAC you can attenuate somewhat, assuming that we can't bear a dynamic range of 96dB minus 2 or 3 bits. This is not new of course, but in practice useful when you have an 18 bit DAC which can be rather common. Combined with not too much gain in the amps in relation to the sensitivity of the speakers you have a fair amount of attenuation in that case.
For an 18 bit DAC I stated the maximum attenuation at -48dB, knowing that at -42dB the sizzling of quantization just starts to be audible with your ear in the speaker when actually nothing is playing but the signal is on (say, very soft passages). This is subjective to my hearing of course.
Btw note that I talk NOS here, which is much more sensitive to this than (heavy) oversampling DACs, which soften everyting anyway. Dither (hence at the micro level) included. Maybe this isn't worth anything to most, but to me it is.
Lastly for now, even under 48dB (for 16 bit material and a 24 bit DAC) I will implement (near) 3dB steps. The justification of this is more tough though, but I think it can work just the same (in a model it does anyway). So this is your next challenge. If you like challenges ...
Peter
Follow Ups:
Post a Followup:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2009, Audio Asylum, all rights reserved ]